Microchip Technology CW01K6-G

Overview

CW01K6-G from Microchip Technology is a 4-channel low-phase-noise continuous wave (CW) transmitter IC designed for high-precision ultrasonic excitation. It integrates four independent N-channel gate drivers with 100 V open-drain outputs, a high-speed D flip-flop per channel synchronized to up to 200 MHz clock input, and dual undervoltage lockout (UVLO) on VDD and VLL. It is used in diagnostic medical ultrasound transmitters requiring precise timing alignment and minimal jitter across channels.

For engineers reviewing the CW01K6-G datasheet, CW01K6-G pinout, CW01K6-G application, or CW01K6-G equivalent, key selection considerations include its 100 V output capability, 4.7 Ω typical on-resistance, –171 dBc/Hz phase noise at 1 kHz offset (80 MHz CLK), 5.1 ns CLK-to-HVOUT delay matching, and dedicated per-channel gate drive supply pins (VD1–VD4) for crosstalk suppression.

Technical Context

The CW01K6-G implements four independent high-speed D flip-flops, each clocked on the rising edge of a common CLK signal, enabling synchronous alignment of DIN1–DIN4 inputs to a high-frequency reference. Each channel features isolated gate drive voltage supplies (VD1–VD4) and power grounds (PGND1–PGND4) to minimize supply-induced jitter and inter-channel coupling.

It incorporates dual UVLO circuitry-separate thresholds at 1.5 V for VLL and 4.0 V for VDD-to prevent spurious output activation during power ramp-up. The HVOUT outputs operate as open-drain N-channel switches capable of sinking up to 0.8 A saturation current with 4.7 Ω typical on-resistance, driven by logic-level inputs referenced to VLL (1.65–5.5 V range).

Key Specifications

Pinout & Package

24-lead QFN package (4.0 mm × 5.0 mm, 0.5 mm pitch, 1.0 mm max height), RoHS-compliant, lead-free matte tin finish. Exposed thermal pad (center) must be externally shorted to all PGND and VSS pins for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage ultrasonic transmitter applications.

Compared with HV809 and DRV2700, the CW01K6-G uniquely combines 4-channel integration, on-die D flip-flop synchronization, per-channel gate supply isolation, and ultra-low phase noise-making it optimal for compact, low-jitter, multi-element CW ultrasound transmitters where timing coherence and jitter suppression are design-critical.

Availability

CW01K6-G is available at Aetrix Electronics and suitable for diagnostic medical ultrasound, fluid flow measurement, and non-destructive testing applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for CW01K6-G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, FPGAs, and timing solutions, with ISO/TS-16949-certified manufacturing.

The CW01 product line was developed specifically for high-precision, low-jitter continuous-wave ultrasonic transmission in medical and industrial sensing, emphasizing channel isolation, timing fidelity, and high-voltage robustness.

FAQ

What is the maximum allowable voltage on the HVOUT pins of the CW01K6-G?

The CW01K6-G specifies an absolute maximum HVOUT drain voltage of –0.5 V to +120 V. Its operational high-voltage output rating is 100 V, verified under DC and pulsed conditions per the datasheet's Electrical Characteristics table. Exceeding 100 V during normal operation risks reliability degradation; the 120 V limit is a stress rating only and not intended for functional use. Always observe the 100 V design limit in CW01K6-G applications.

Does the CW01K6-G require external level-shifting circuitry to drive PZT transducers?

No, the CW01K6-G does not require external level-shifting circuitry to drive typical PZT transducers. Its 100 V open-drain N-channel outputs and integrated level translator (VDD/VLL architecture) enable direct connection to transducers operating up to 100 V. The device accepts logic-level DIN inputs referenced to VLL (1.65–5.5 V), eliminating the need for discrete MOSFET translators or gate driver ICs in most CW ultrasound designs using the CW01K6-G.

How is inter-channel timing skew minimized in the CW01K6-G?

The CW01K6-G minimizes inter-channel timing skew through three design features: (1) a single global CLK input synchronizing all four internal D flip-flops, (2) matched internal propagation paths yielding ±0.5 ns delay matching (ΔtdLH/ΔtdHL), and (3) physically isolated per-channel gate drive supplies (VD1–VD4) and power grounds (PGND1–PGND4) to suppress supply-induced jitter. These ensure sub-nanosecond coherence essential for phased-array beamforming in the CW01K6-G.

Can the CW01K6-G operate with different supply voltages on VD1–VD4?

Yes, the CW01K6-G allows independent setting of VD1–VD4 supply voltages within the 4.5–5.5 V range, though the datasheet recommends maintaining them at the same potential as VDD for optimal performance. This flexibility enables fine-tuning of rise/fall times and drive strength per channel-for example, adjusting VD1 for a higher-power transducer while keeping VD2–VD4 at nominal 5 V. All VDx pins must remain within absolute maximum ratings (–0.5 V to +6 V) to avoid damage to the CW01K6-G.

What thermal management is required for the CW01K6-G in continuous operation?

The CW01K6-G has a junction-to-ambient thermal resistance (θJA) of 26.9°C/W when mounted on a 4-layer 3"×4" PCB. At full load (all four channels active, fCLK = 200 MHz), total power dissipation reaches ~3 W. To maintain TJ ≤ 125°C at TA = 85°C, ≥2.5 cm² of 2-oz copper connected to the exposed thermal pad is recommended. The center pad must be soldered and shorted to all PGND/VSS pins; insufficient thermal relief will cause thermal shutdown or accelerated parametric drift in the CW01K6-G.